ZQCr2磨球凝固过程数值模拟及工艺优化  

Numerical Simulation of ZQCr2 Low Chromium White Cast Iron Grinding Ball during Solidification and Processing Optimization

作　　者：丁恒敏[1] 张艳华[1] 

机构地区：[1]昆明理工大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2016年第1期23-26,共4页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(50964009);云南省科技厅应用基金面上项目(2009ZC030M)

摘　　要：针对尺寸为100mm的ZQCr2低铬合金铸铁磨球的铸造工艺,利用华铸CAE软件对磨球的凝固过程进行了流动场和温度场的数值模拟,预测了100mm低铬合金铸铁磨球在铸造中可能产生的缺陷位置,并对磨球内部产生缩孔、缩松的原因进行了分析。通过增加上铁型及砂套,缩短内浇道尺寸等进行了修改和优化,并对浇冒系统优化前、后的铸造方案进行了温度场的数值模拟对比。结果表明,优化后的浇冒系统实现了顺序凝固,缩孔缺陷从磨球内部转移到了冒口内,模拟结果与实际浇注结果相符。The temperature field and flow field in low chromium white cast iron grinding ball in sand mold during solidification process were simulated by the InteCast software.The possible defect position in the100mm grinding ball was forecasted.The origination of shrinkage holes in the grinding ball was analyzed.The gating system was modified to optimize design by adding sand sleeves,shortening ingates and reducing the riser size as well as other methods.The temperature field of the gating system before and after optimization was simulated.The simulated results show that the optimized gating system can realize the sequential solidification,and shrinkage holes are transferred from the ball to the riser.The simulated results are consistent with the actual casting ones.

关 键 词：华铸CAE 数值模拟 凝固过程 温度场 补缩 

分 类 号：TG250[金属学及工艺—铸造]